Article

Applied Physics A

, Volume 79, Issue 3, pp 573-577

Nanoindentation of carbon microfibers deposited by laser-assisted chemical vapor deposition

  • R. LongtinAffiliated withDepartment of Materials Chemistry, The Ångström Laboratory, Uppsala UniversityFreeform Fabrication Laboratories, Department of Mechanical Engineering, École Polytechnique de Montréal Email author 
  • , C. FauteuxAffiliated withDepartment of Materials Chemistry, The Ångström Laboratory, Uppsala UniversityFreeform Fabrication Laboratories, Department of Mechanical Engineering, École Polytechnique de Montréal
  • , E. CoronelAffiliated withDepartment of Materials Science, The Ångström Laboratory, Uppsala University
  • , U. WiklundAffiliated withDepartment of Materials Science, The Ångström Laboratory, Uppsala University
  • , J. PegnaAffiliated withFreeform Fabrication Laboratories, Department of Mechanical Engineering, École Polytechnique de Montréal
  • , M. BomanAffiliated withDepartment of Materials Chemistry, The Ångström Laboratory, Uppsala University

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Abstract

Carbon microfibers were deposited using laser-assisted chemical vapor deposition at atmospheric and sub-atmospheric pressures. Precursor pressures and incident laser powers were varied. Fibers were cast in acrylic resin and polished to allow nanoindentation of the cross sections. Cross-sectional roughness was examined by optical profilometry. A radial change in mechanical properties was observed. The local elastic modulus (Young’s modulus) and hardness for the edge and core regions are reported. These mechanical properties were investigated with respect to deposition parameters and corresponding fiber microstructure.